Changes in metric timestamps in 5.1 update 2a?

Hello,

I've noticed that when using latest version of vCenter - 5.1 update 2a timestamps of metrics are associated with START of the timestamp instead of the END.

In earlier versions and in vCenter 5.5 it was always the END of timestamp (e.g. vCenter 5.1. build 1064983 ). Does anybody is aware if it's made by purpose or maybe it is a bug in this build? (vCenter 5.1. build 1882349).

As we observed it affects answer, e.g. data from 00:00:00 - 00:01:00 are timestamped with values (00:00:00, 00:00:20,00:00:40) instead of (00:00:20,00:00:40, 00:01:00).

But if anybody knows if it affect also requests?

I mean does asking for data from 00:00:00 - 00:01:00 will give us data  00:00:00 - 00:01:00 or maybe  23:59:40 - 00:00:40?

Thanks in advance!